Improvement in steam-generators



E. GDDARD.

Y Steam-Generators.

No. 145,293. r Patentednemgnss.

UNITED STATES' PATENT Orron.

ELBRIDGE GODDARD, 0F ST. LOUIS, MISSOURI.

IMPROVEMENT IN STEAM-GENERATORS.

Specification forming part of Letters Patent No. 145.293, dated December9,1873, application filed June 7, 1873.

To all whom t may concern:

Be it known that I, ELBRinGE GODDARD,

vof the city and county of Saint Louis, State 'a novel and improved modeof attaching and arranging such pipes. rlhe object of the invention is,mainly, to insure a circulation when, owing to the position of themud-drum, or other cause, the circulating-pipes have to be arranged innearly, if not quite, a hori zontal position. A further aim is to avoidan interruption of the draft, as much as is possible, in the arrangementof the circulating-pipes. It is also desirable to have the connectionsof such pipes as accessible and as much out of the direct heat aspossible, so that the same may not be injured, and, if needing repairs,be readily reached.

I have provided a construction meeting these demands, which isapplicable to. all boilers not having too many iiues to allow space inthe heads for my attachment.

A in the several iigures represents a boiler of the ordinaryconstruction, having two common mud-drums, B vB', Figs. 1, 2. B, Fig. 3,B', Fig. 4, C C', Figs. 2, 3, 4, C', Fig. 1, are two' ordinary pipes,such as are usually used for this purpose, arranged, as seen in Fig. 2,beneath the boiler, and extending, at the rear end, through the usualflue-space, and beyond the fire-wall, and, at the forward end, beyondthe ordinary lire-front of the boiler. The front ends of these pipes areconnected by the pipe D, which, in turn, is connected with the boiler bythe pipe E, Figs. l, 2. The rear ends of the pipes are connected bythecurved pipe G, which latter is connected, by the pipe H, with the rearend of the boiler. Both ends of the pipes C C are provided with caps orplugs, by removing which the interior of the pipes may be reached; andboth ends of these pipes, and also the whole ofthe pipes D and G and E,and the outer end of the pipe H, being outside of the iire-wallsinclosin g the boiler, all needed vrepairs may be readily made, and thelconnections are not liable, by reason of the direct actionl of theflame, as in other cases, to become leaky; and when, from the shortnessof the leg of the mud-drum or outer cause, it is impossible to have theattachment at the lowest points of the boiler, (which lastmentionedfeature is absolutely essential,) and yet attain the inclination shown,or, indeed, any perceptible inclination, this connection outside therear wall compensates for the want of such inclination by providin g amore `circuit'- ous route for the water at the cooler end ofthe boiler,and an excess of pipe at the same end beyond the iiue-spacc 5 for bothof said lastmentioned conditions promote a circulation in the pipes thatis in harmony with that in the boiler. l

The several pipes may be made of any desired size, care, however, beingtaken to make the capacity of the pipe E entering the boiler as large,or larger, than the united capacities of the two branches of the pipe D,in order that the water passing through the pipes C C may receive nocheck as it passes into the boiler, but may have a free and continuouslow.

The pipes E and H enter the ends of the boiler as near the bottom aspossible.

Vhat I claim as my invent-ion, and desire to secure by Letters Patent,is-

The vcombinat-ion of the boiler A, pipes C, C', D, E, G, and H, bothends of the pipes C C', the whole of the pipes D and G and E, and theouter end of the pipe H,`outside of the iirewalls, inclosing the boiler,and all constructed, arr. nged, and operating, substantially as and forthe purpose shown and speciied.

ELBRID GE GODDARD.

